Ragnest

Multi-knowledge-base RAG system with MCP integration for Claude Code.

Create multiple knowledge bases, each with its own embedding model, chunk settings, and vector backend. Search them from Claude Code via 29 MCP tools.

Quick Start

1. Add to Claude Code

claude mcp add ragnest -- uvx ragnest

On first run, Ragnest creates ~/.ragnest/config.yaml and ~/.ragnest/.env with defaults. The MCP server starts immediately — no manual config needed.

2. Check setup

Ask Claude: "check ragnest setup status" — it will call ragnest_setup_status() and tell you what's missing.

3. Prerequisites

You'll need these before creating knowledge bases:

• Ollama for embeddings:

  brew install ollama && brew services start ollama
  ollama pull bge-m3
  

• PostgreSQL 15+ with pgvector for vector storage:

  pip install ragnest  # if not using uvx
  cd $(pip show ragnest | grep Location | cut -d' ' -f2)/../..
  docker compose up -d
  

  Or use any PostgreSQL 15+ instance with pgvector installed.

4. Configure

Edit ~/.ragnest/config.yaml with your database settings:

database:
  host: localhost
  port: 5432
  name: ragnest

Edit ~/.ragnest/.env with credentials:

RAGNEST_DATABASE__USER=ragnest
RAGNEST_DATABASE__PASSWORD=yourpassword

Claude can help you with this — just ask.

Installation

pip install ragnest

Usage

Initialize a knowledge base from a folder

init_kb("my_docs", "/path/to/docs", "bge-m3", file_patterns="*.py,*.md")

Creates the KB, sets a watch path with file filtering, and queues files for embedding.

Run the worker

ragnest-worker --scan --kb my_docs

The worker processes the queue: reads files, chunks text, generates embeddings via Ollama, and stores vectors in PostgreSQL.

Search

search_kb("my_docs", "how does authentication work", top_k=5)
search_all_kbs("deployment process", top_k_per_kb=3)

Returns ranked results with source filenames, scores, and text chunks.

Architecture

Claude Code ──MCP──▶ MCP Server (29 tools)
                         │
              ┌──────────┼──────────┐
              ▼                     ▼
         SQLite                Vector Backend
       (local state)           (pgvector)
              │                     ▲
              └──────▶ Worker ──────┘
                         │
                      Ollama
                    (embeddings)

Two-layer storage:

MCP Tools

Features

• Zero-config startup — MCP server starts immediately, scaffolds config on first run
• Setup wizard — ragnest_setup_status checks all prerequisites and guides through fixes
• Multiple knowledge bases — each with its own embedding model, dimensions, and chunk settings
• Per-KB backend routing — route different KBs to different PostgreSQL databases
• External KB support — connect to remote vector stores in read-only or read-write mode
• Watch paths with file filtering — glob patterns like *.py,*.md to control what gets indexed
• Batch tracking — view progress, retry failures, undo entire batches
• Resilient worker — per-file commits, SIGINT/SIGTERM handling, resume on restart
• Content deduplication — SHA-256 hashing skips unchanged files
• Cross-KB search — search all knowledge bases in one call
• Remote Ollama — configure any Ollama-compatible API endpoint
• Export — Parquet or JSON with model metadata sidecar

Configuration

Config is auto-created at ~/.ragnest/config.yaml on first run. All settings can also be overridden via environment variables with RAGNEST_ prefix:

Multiple backends

databases:
  local:
    host: localhost
    port: 5432
    name: ragnest
  cloud:
    host: xyz.supabase.co
    port: 5432
    name: postgres

Then specify backend="cloud" when creating a KB.

Worker

ragnest-worker --scan                 # Scan watch paths + process queue
ragnest-worker --scan --kb my_docs    # Specific KB only
ragnest-worker --retry                # Retry failed files
ragnest-worker --scan --dry-run       # Preview what would be queued

Development

git clone https://github.com/november-pain/ragnest.git
cd ragnest
pip install -e ".[dev]"

make lint             # ruff check + format
make typecheck        # mypy + basedpyright (strict)
make test             # pytest

License

MIT